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AB Stone - Precast concrete interlocking blocks

Verified by manufacturer 7 days ago

Colinwell Masonry Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

  • NSAI Agrément Certificate

    NSAI Agrément Certificate

    Certificate type

AB Stone Mortarless Retaining Wall Blocks allow for the construction of mortarless retaining walls with a 12 degree setback.

Jump to:
BOS
+44 (0)28 9061 8145 Website

Application

Suitable for:

  • All types of road and rail infrastructure projects that require approval by the Highways Agency (as the product holds a BBA Roads and Bridges certificate).
  • Large commercial and residential walls.
  • Low gravity (unreinforced) walls.


Depending on site conditions, walls can be constructed up to 1.7 m in height, using the blocks and granular fill only. Taller walls will require reinforcement, most often through the use of Geogrid or No-Fines Concrete.


CE marked and manufactured in accordance with BS EN 771-3, BBA 13/H203, ISO 9001 and ISO 14001.

Description

Allan Block is a hollow-core, dry-stacking concrete block for the construction of retaining walls. Designed with a 12° raised front lip, which automatically establishes the setback from vertical.

Manufactured from a mixture of aggregates (65% recycled secondary aggregate content) and cement.


Features and benefits:

  • Cost-effective and versatile.
  • Expected lifespan of 120 years (if designed and built in accordance with its British Board of Agrément (BBA), Roads and Bridges certificate).
  • Includes a hollow-core design which makes blocks easy to handle, promotes drainage and becomes solid when filled with stone.
  • Anti-climb edge.
  • No need for pins, clips or mortar.
  • Can be constructed regardless of weather conditions.
  • Built-in drainage.
  • Depending on site conditions, walls can be constructed up to 1.7 m in height, using the blocks and granular fill only.
  • Taller walls will require reinforcement, most often through the use of Geogrid, No-Fines Concrete or building a double-width gravity wall.
  • CE-marked and manufactured in accordance with BS EN 771-3, ISO 9001 and ISO 14001.
  • Durable and maintenance-free.
  • Freeze-thaw resistance.
  • High strength, durable block.
  • Efflorescence-free.

General information

Color

Grey

Manufacturer guidance

Abbey Blend, Cinder Blend, Limestone Blend, Pewter Blend, Slate Blend, Yorkstone Blend.

Finish

Textured

Manufacturer guidance

Split-face finish.

Material

Concrete

Shape

Rectangle

Length

450 mm

Width

300 mm

Height

200 mm

Material

Concrete

Uniclass

Pr_20_93_71_15 Concrete interlocking blocksPrimary

CAWS

D41/310 Drystack interlocking masonry

F10/18 Concrete facing blockwork

F10/255 Concrete facing blockwork

Product range

Blocks

Specification data - Concrete interlocking blocks

Standard

To BS EN 771-3.

Properties

-

Dimensions

450 x 300 x 200 mm.

Weight

35 kg.

Special units

-

Type of special unit

Not required.

AB Corner Block.

Guidance for specification option:

  • H x W x D: 200 x 400 x 200 mm.
  • Available left or right-handed, 26 kg.
  • Insert requirements.

AB Wall Caps.

Guidance for specification option:

  • H x W x D: 100 x 450 x 300 mm.
  • Weight: 27 kg.
  • To be fixed with a high-grade, waterproof, flexible masonry adhesive.

Geogrid.

Guidance for specification option:

  • For use when the block weight and setback do not provide enough structural support.
  • For taller walls.
  • Typical Geogrid reinforced walls will require an excavation depth of 70% or more of the wall height, to accommodate geogrid tails.
  • Consult manufacturer for information.

No-Fines Concrete Backfill.

Guidance for specification option:

  • Will allow taller walls to be constructed with less excavation.
  • For taller walls.
  • Will require an excavation depth of approximately 40% of the wall height.
  • Consult manufacturer for information.

Dimensions of special units

-

Manufacturer guidance

  • As 'Type of special unit' selected above.
  • Consult manufacturer for details and insert requirement.

Finish

-

Exposed faces

Split-face texture.

Concealed faces

Split-face texture.

Colour

Abbey blend.

Cinder blend.

Limestone blend.

Pewter blend.

Slate blend.

Yorkstone blend.

Recycled content

65%.

Guidance for specification option:

Secondary aggregate content.

Block description

Split-face texture, hollow-core, dry-stacking, precast interlocking concrete blocks.

Guidance for specification option:

  • Material: Concrete mixture of aggregates and cement.
  • Raised front lip: 12° (automatically establishes the setback from vertical).

Angle

Setback: 12°.

Average density

2100 kg/m³.

Water absorption

3–6%.

CoverageArea

11.11 m² (approximately).

Guidance for specification option:

Face coverage.

Efflorescence

None.

Compressive strength (mean value)

30 N/mm².

Life expectancy

120 year.

Guidance for specification option:

If designed and built in accordance with its British Board of Agrément (BBA), Roads and Bridges certificate.

Sustainability data

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Material

Concrete

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

65 %

Guidance for specification option:

Secondary aggregate content.

Expected Life

120 year

BIM objects

BOS

NBS BIM Object Standard

This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.

Find out more about the NBS BIM Object Standard.

Platform Compatible Version
IFC
-

1

Revit

Revit 2016

2

Third party certifications

BBA Agrément Certificate

BBA Agrément Certificate

BS EN ISO 9001 Quality Management Systems

BBA Agrément Certificate

BBA Agrément Certificate

EN ISO 14001 Environmental Management Systems

NSAI Agrément Certificate

NSAI Agrément Certificate

NSAI Certificate of Conformity

Case studies

Millmount Village, Dundonald, Belfast

Millmount Village, Dundonald, Belfast

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